Question about UCI capabilities

[Healb00n]

I asked this already in the J3 segment. I was wondering how far you can manipulate the default settings of the S9/J3 with the UCI changes, because there are some things, I would like to change.
For instance, is it possible that the S9/J3 music browser is built up by different tags, like, let's say "Album Artist".
Or can one make a shortcut to a specific folder position (clicking on folders will lead you to the root directory of the player, it would be nice, if you would start directly in the music folder).
I have absolutey no expierences of constructing such UCI's and was hoping that that some skilled member of this forum is able to answer my questions